Smartring Colmi R10 21.6MM 12 (sort)Smartring Colmi R10 21. 6MM 12 (black) Colmi R10 is a smart ring that combines activity and health monitoring features with a minimalist design. Equipped with an array of sensors, it allows you to track key body parameters around the clock. With the included app, you can access real time data and clear statistics without having to wear a watch or wristband. Around the clock health monitoring Colmi R10 continuously analyzes your heart rate, blood